docs: def _toggle_transparency(self, changed_from_config_window=False, force_value=None):
          """ Toggles theme trasparency.
  
              changed_from_config_window is used to inhibit toggling from within
              Config Window when 'T' is pressed.
  
              force_value will set trasparency if True or False,
              or toggle trasparency if None
          """
          if self.window_mode == CONFIG_MODE and not changed_from_config_window:
              return
          self._theme.toggleTransparency(force_value)
          self._cnf.use_transparency = self._theme.getTransparency()
          if self.operation_mode == THEME_MODE:
              self._theme_slector.transparent = self._cnf.use_transparency
          self.headWin.refresh()
          self.bodyWin.refresh()
          self.footerWin.refresh()
          if self._config_win:
              self._config_win._config_options['use_transparency'][1] = self._cnf.use_transparency
              if not changed_from_config_window:
                  self._config_win._saved_config_options['use_transparency'][1] = self._cnf.use_transparency
                  self._config_win._old_use_transparency = self._cnf.use_transparency